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soal seharusnya
Jika a/3=b/2=c/4 maka nilai dari c/(a+b-c)
pembahasan :
a/3 = b/2
2a = 3b
a = 3b/2 → persamaan 1
a/3 = c/4
4a = 3c
a = 3c/4 → persamaan 2
b/2 = c/4
4b = 2c
b = 2c/4 →persamaan 3
subtitusikan nilai b ke persamaan 1
a = 3b/2
a = 3/2 . 2c/4
a = 3c/4
masuk ke soal
c / (a+b+c)
= c / (3/4 c + 2/4 c + c)
= c / (3/4 c + 2/4 c + 4/4 c)
= c / (9/4 c)
= 1 /(9/4)
= 4/9
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kelas : 12 SMA
mapel : -
kategori : soal test masuk stan
kata kunci : soal test masuk stan